Home QoS QoS General Weighted RED (WRED)?


The WRED algorithm provides congestion avoidance on network interfaces by providing buffer management, and by allowing Transmission Control Protocol (TCP) traffic to throttle back before buffers are exhausted. This helps avoid tail drops and global synchronization issues, maximizing network usage and TCP-based application performance. WRED works by selectively dropping packets before congestion occurs, so it is considered to be a congestion avoidance feature.

 

  • WRED is a congestion avoidance mechanism, based on the adaptive nature of TCP traffic for congestion.
  • WRED allows for differentiated dropping behavior based on either IP precedenceor DSCP.
  • WRED is configurable in a CBWFQ policy-map.

 

Reference:http://www.cisco.com/en/US/tech/tk543/tk760/tsd_technology_support_protocol_home.html

Last Updated (Friday, 22 May 2009 18:19)

 
Smart Link
Search
Statistics
Content View Hits : 2152162
Polls
Highly recommended firewall vendor?
 
Google Translation
English Arabic Chinese (Simplified) Czech Dutch French German Italian Korean Portuguese Russian Spanish Filipino Vietnamese Thai Turkish
BGP routing issue?
Banner
World Route Servers
Banner
Who's Online
We have 42 guests online